iio: adc: cf_axi_adc_core: axi_ad9250 supports now channel selection

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
arch:arm:configs: Update zync_xcomm_adv7511_defconfig

Enable iio trigger hrtimer

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>